Umbraco CMS 17 End of Life
Support dates and upgrade guidance — rebuilt from live data.
Supported
Umbraco CMS 17 is actively supported. It reaches end of life on 27 Nov 2028.
841 days of security support left
17.6.0 latest release
23% of this branch's supported lifetime has elapsed — 27 Nov 2025 → 27 Nov 2028.
Support timeline
Official dates from the Umbraco CMS release process.
| Milestone | Date | Status |
|---|---|---|
| Initial release | 27 Nov 2025 | — |
| End of life (scheduled) | 27 Nov 2028 | in 841 days |
| Active support ended | 27 Nov 2027 | security fixes only after this |
| Latest release | 17.6.0 · 5 Aug 2026 | current |
How much runway a newer branch buys
Moving to Umbraco CMS 18 extends security support by about -521 days.
| Branch | End of life | Days left | vs 17 |
|---|---|---|---|
| Umbraco CMS 18 | 25 Jun 2027 | 320 | -521 days |
| Umbraco CMS 17 | 27 Nov 2028 | 841 | this branch |
| Umbraco CMS 13 | 14 Dec 2026 | 127 | -714 days |
Frequently asked questions
When does Umbraco CMS 17 reach end of life?
Umbraco CMS 17 reaches end of life on 27 Nov 2028 — 841 days from now. After that date it receives no security fixes.
Is Umbraco CMS 17 still supported?
Yes. Umbraco CMS 17 is currently maintained. Latest release: 17.6.0, published 5 Aug 2026.
What happens when Umbraco CMS 17 reaches end of life?
Security fixes stop. After 27 Nov 2028 this branch receives no further updates under standard support.
How long do I have to upgrade from Umbraco CMS 17?
841 days. Moving to Umbraco CMS 18 instead buys roughly -521 more days of security support.